Seth braggins



No Model.) S. BRAGGINS.

STEAM BOILER. No. 410,309. Patented Sept. 3, 1889.`

u. ravens. mwumempw. whingm. n. c.

i UNITED STATES PATENT OFFICE.N

SETH BRAGGINS, OF ROCHESTER, NEI/V YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 410,309, dated September 3, 1889.

y Application led May 9, 1889. Serial No. 310,165. (No model.)

To au whom t may concern: V

Be it known that I, SETH BRAGGINs, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Steam-Boilers, which improvement is fully set forth in the following specification, and shown in the accompanying drawings.

My invention relates to that class of steamboilers or steam-generators known as sectional boilers, and the invention consists more especially in the form and arrangement of the sections and their connection with the other parts of the boiler. The boiler'consists, essentially, of a central upright cylindrical part or body surrounded by vertical pipes, the latter being each composed of several sections, each connected by a horizontal tube with the central body. The sections of the surrounding pipes are constructed to abut together at their ends, (separated only by thin gaskets,) the ends of the sections being curved. The construction of the sections is such that any one, with its connecting-tube, may be removed from its place in the boiler and replaced without removing the adjacent sections.

Referring to the drawings, 4Figure l shows a side elevation of portions 'of the steamboiler, parts being centrally and vertically sectioned, many parts being omitted; Fig. 2, a view of a vertical pipe, seen as indicated by arrow in Fig. 1, some of the sections being shown in two positions by full and dotted lines. Fig. 3 is a sideelevation of the boiler, parts of the jacket being broken away and a part of one of the side pipes with associated parts vertically sectioned. Fig. 4 is a view of parts of the boiler, seen from a point overhead, the jacket and other parts being omitted. Fig. 5, drawn to an enlarged scale, better shows the interior form of the sections and the joints between them.

Referring to the parts shown in the drawings, A is the central cylindrical part or body of the boiler, and B the side pipes surrounding the body A, each pipe being composed of sections a b alternated. These pipes are preferably placed equidistant from the central body A, and each section is connected with said central body by a short tube o, to the end that a free circulation of water or steam may water-space for the generator.

occur through all the parts. The bodyA is provided with an upper head d and a lower head c, the two being held to place by a bolt f, preferably threaded into the lower head and provided with a tightening-nut g above the upper head. The vertical pipes B have central bolts h extending' through them, these bolts, with some exceptions, being provided at their respective ends with tightening-nuts i'.

This steam-generator is designed more particularly to be heated with an atomized fuel, as a hydrocarbon; but any fuel, as wood or coal, may be employed in the usual manner.

The space within the body A and. the surrounding pipes and tube-connections constitute the steam and water space of the generator, a free circulation being had. through all said parts. Some suitablejacket C is provided to surround the generator proper, as shown in Fig. 3.

As usually constructed, I support the generator upon hollow pedestals k, the latter resting upon a hollow base D. y These pedestals are equally spaced, they being placed, respectively, directly beneath the lower ends of the vertical pipes B, as shown in Figs. 3 and 4.

When used for other purposes than for a marine boiler, a communication is made between the space within the generator and that within the base D through the hollow pedestal e, the space within said pedestal and base constituting in such cases additional When used as a marine boiler, imperforate dividingblocks Z are employed to separate the pipes B and the associated pedestals. When these separating-blocks are employed, they are held to their respective pedestals and the latter` to the base D by bolts n, threaded in their under surfaces, the bolts h, passing through the superincumbent pipes B, being threaded in the upper sides of said blocks, as shown in Fig. 3. WVhen the` construction is such that there is a communication between the pipes and pedestals, as above stated, the bolts h in the pipes over the pedestals extend downward to the base D. Incase of the other pipes B the bolts h terminate at both ends in screw-nuts i, as shown and above stated.

The sections a b, which 'constitute the essential part of my invention, are formed with IOC V'them and removed.

curved ends, as shown, the ends being curved on the arc of a circle the diameter of which corresponds with the axis of the section. For instance, the curves of the ends of a section a., Figs. 2 and 1, are concentric with the axis p of its connectingtube c, which axis cuts the axis of the section at right angles, and the adjacent concave ends ofthe two contiguous sections b b are also concentric with this axis. Now, on account of this form or character of the curves of the ends of the sections these sections may be placed so as to abut together in a column to Yform a pipe B, asshown, each being connected with the central body A by its tube c. The latter are each permanently secured to its section, so that the tubes may be screwed into or out of the body A, the

threaded for the purpose. In putting these sections together to form a pipe B, the sections b are first put to place by screwing the ends of the respective tubes c into the holes in the body A, these holes being formed in vertical rows and threaded to a gage. Then the sections a are turned into their places, this being permitted on account of the form of the curves of the ends of the sections, as stated. Whenfnecessary, any one of the sections a, with its connecting-tube c, maybe removed from the boiler without disturbing the VYrest. To remove a section b, the contiguous sections a'are first turned through one-fourth of a revolution, so as to stand at right angles with the pipe, as shown by dotted lines in Fig. 2. The

Vsection l) maythen be readily turned between Vhen the ends of the sections are thus truly curved and the sec tions made of the proper length, they form tight joints with each other when put together in a columnV to form a pipe and are pressed together by the bolt 71. Usually, however, before the bolt is tightened I spring the sections Aapart and insert between the contiguous ends thin copper gaskets s. The upper and lower sections a CL of each pipe are made in the form of elbows, each being provided 4with a seat o" for theY tightening-nuts e'. The bolt 7L, it will be understood, has to be removed before a section can be turned, as

stated.

As shown in Fig. l, the water-line is just above the fourth tube c from the bottom, which may be regulated at pleasure. The

space above is 'fort-he steam, the latter being,

taken out through an orifice t to t-he engine.

The usual gage-cocks are'inserted in the sections of one of the pipes B. The sections I prefer to make cylindrical and of uniform diameter, as shown. They may, however, be oval in cross-section or of other form.

E, Fig. 3, is the fire-space. The lower head of the body A is made pointed or conical at its under surface to deflect the upward currents of heat toward the pipes B. The ascending heat sifts through the interstices between the tubes c, which tubes, together with the pipes B and body A, present a large sur-V face to the action of the heat. lhe shells or walls of the sections are made thicker at the ends forthe purpose of aording a broader surface to form the joints between them, thc

Vfeature being clearly shown in Fig. 5. holes 0 and the ends of the tubes being 'i What I claim as my invention ism l. A steam -generator having hollow sections connected to form a pipe, said sections being formed with circular faces, respectively concave and convex, as shown, to allow of a rotating movement, for the purpose set forth.

2.V In a steam-boiler, a central body, in combination with hollow sections arranged to form pipes at the side of said central body, and connecting-tubes for said sections and central body, substantially as shown.

3. A sectional steamboiler having hollow sections connected to form a pipe, one section having convex ends and the adjacent section having concave ends, substantially as shown and described.

4. A steam-generator having hollow sec tions connected at their ends, said sections being formed wit-h circular faces, respectively concave and convex, and having the shell or wall at the ends made thicker than at the middle parts thereof, substantially as described.

5. A steam -boil'er consisting of a hollow base, hollow pedestals, a central body and side pipes, the latter being formed of sections each connected with said central body, the pedestals being placed beneath various ones of said side pipes and forming communications for water between said side pipes andV base, substantially as shown.

In witness whereof I have hereunto set my hand this 2d day of May, 1889, in the presence of two subscribing witnesses.

SETH BRAGGINS.

Iitnessesz E. B. WHirMoRn, f M. L. MCDERMOTT.

IOO 

